This project uses an ESP32 to connect to an SMA SunnyBoy inverter, using Bluetooth, and regularly publish generation data via MQTT. There is also an option to publish the required topics to allow Home Assistant to automatically detect the various sensors.

It was originally forked from https://github.com/delhatch/ESP32_to_SMA, but I also heavily referenced https://github.com/SBFspot/SBFspot.

This is working for me - but the code is some what of a mess and could do with some (lots of) cleaning up.

All my development and testing was done on an SMA Sunny Boy SB 5000TL-21 (manufactured in 2021).

All required configuration is done in the site_details.h file, to create this, copy the site_details-example.h file to site_details.h and update all of the constants accordingly.

The project is developed and designed for use in VScode/PlatformIO. It may work in Arduino, but I would highly recommend using PlatformIO as it'll also automatically get the libraries etc that are required.

The image initially needs to be flashed via Serial, update your platformio.ini accordingly to match your setup.

Once the first image is uploaded, and it's connected to the network, you can update using OTA updades:

• Build the firmware.bin file (PlatfromIO Build)
• Run curl to upload the new file, for example: curl -F "[email protected]/build/lolin_d32/firmware.bin" http://1.2.3.4/update

If you have any questions, please create a GitHub issue and I'll try to help.